Removing Armature and Keeping pose
Just apply the Armature Modifier for every loose part of your model. Then delete the armature. Before that I recommend you to apply transformations to all the parts (Ctrl+A).


I noticed, that legs mesh has multiple users and the error occurs. Go to Object Data header and click the '2' button to make it a single user.



I've noticed, that after applying the Armature Modifier for the knife an error accured. I just deleted the modifier and everything works okay, but this is is the first time I see this kind of error. I've got no idea how to fix it (I should ask a question about it).


After applying Armature Modifier to every part of your model you may delete the bones.
Cool model BTW :).